For utility models ( Long plunger sucker rod pump) we applied, was granted with strict examination by State Intellectual Property Office, on the basis of Patent Law of the People’s Republic of China, and was issued the letter of patent by State Intellectual Property Office, with registration on patent rolls. ( Patent No: Zl  2015 2 0552148.3)
       The propose for the design which goes simple structure, high efficiency, working under various Well conditions,
       The beneficial effort of the type, which the upper part of inner diameter for whole pump barrel is smaller than the lower part of inner diameter. it is not only suitable for the well of large oil viscosity, but also enhanced for pumping efficiency. In Addition, auxiliary booster device of the valve makes the pump working under sandy Well condition with large angle, which is more valuable and economic.